- char *channel_map_in_ss, *channel_map_in_ds, *channel_map_in_qs;
- char *channel_map_out_ss, *channel_map_out_ds, *channel_map_out_qs;
+ signed char *channel_map_in_ss, *channel_map_in_ds, *channel_map_in_qs;
+ signed char *channel_map_out_ss, *channel_map_out_ds, *channel_map_out_qs;